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/*
* contrib/btree_gist/btree_date.c
*/
#include "postgres.h"
#include "btree_gist.h"
#include "btree_utils_num.h"
#include "utils/builtins.h"
#include "utils/date.h"
typedef struct
{
DateADT lower;
DateADT upper;
} dateKEY;
/*
** date ops
*/
PG_FUNCTION_INFO_V1(gbt_date_compress);
PG_FUNCTION_INFO_V1(gbt_date_fetch);
PG_FUNCTION_INFO_V1(gbt_date_union);
PG_FUNCTION_INFO_V1(gbt_date_picksplit);
PG_FUNCTION_INFO_V1(gbt_date_consistent);
PG_FUNCTION_INFO_V1(gbt_date_distance);
PG_FUNCTION_INFO_V1(gbt_date_penalty);
PG_FUNCTION_INFO_V1(gbt_date_same);
static bool
gbt_dategt(const void *a, const void *b, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(date_gt,
DateADTGetDatum(*((const DateADT *) a)),
DateADTGetDatum(*((const DateADT *) b))));
}
static bool
gbt_datege(const void *a, const void *b, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(date_ge,
DateADTGetDatum(*((const DateADT *) a)),
DateADTGetDatum(*((const DateADT *) b))));
}
static bool
gbt_dateeq(const void *a, const void *b, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(date_eq,
DateADTGetDatum(*((const DateADT *) a)),
DateADTGetDatum(*((const DateADT *) b)))
);
}
static bool
gbt_datele(const void *a, const void *b, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(date_le,
DateADTGetDatum(*((const DateADT *) a)),
DateADTGetDatum(*((const DateADT *) b))));
}
static bool
gbt_datelt(const void *a, const void *b, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(date_lt,
DateADTGetDatum(*((const DateADT *) a)),
DateADTGetDatum(*((const DateADT *) b))));
}
static int
gbt_datekey_cmp(const void *a, const void *b, FmgrInfo *flinfo)
{
dateKEY *ia = (dateKEY *) (((const Nsrt *) a)->t);
dateKEY *ib = (dateKEY *) (((const Nsrt *) b)->t);
int res;
res = DatumGetInt32(DirectFunctionCall2(date_cmp,
DateADTGetDatum(ia->lower),
DateADTGetDatum(ib->lower)));
if (res == 0)
return DatumGetInt32(DirectFunctionCall2(date_cmp,
DateADTGetDatum(ia->upper),
DateADTGetDatum(ib->upper)));
return res;
}
static float8
gdb_date_dist(const void *a, const void *b, FmgrInfo *flinfo)
{
/* we assume the difference can't overflow */
Datum diff = DirectFunctionCall2(date_mi,
DateADTGetDatum(*((const DateADT *) a)),
DateADTGetDatum(*((const DateADT *) b)));
return (float8) abs(DatumGetInt32(diff));
}
static const gbtree_ninfo tinfo =
{
gbt_t_date,
sizeof(DateADT),
8, /* sizeof(gbtreekey8) */
gbt_dategt,
gbt_datege,
gbt_dateeq,
gbt_datele,
gbt_datelt,
gbt_datekey_cmp,
gdb_date_dist
};
PG_FUNCTION_INFO_V1(date_dist);
Datum
date_dist(PG_FUNCTION_ARGS)
{
/* we assume the difference can't overflow */
Datum diff = DirectFunctionCall2(date_mi,
PG_GETARG_DATUM(0),
PG_GETARG_DATUM(1));
PG_RETURN_INT32(abs(DatumGetInt32(diff)));
}
/**************************************************
* date ops
**************************************************/
Datum
gbt_date_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
}
Datum
gbt_date_fetch(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
}
Datum
gbt_date_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
DateADT query = PG_GETARG_DATEADT(1);
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
/* Oid subtype = PG_GETARG_OID(3); */
bool *recheck = (bool *) PG_GETARG_POINTER(4);
dateKEY *kkk = (dateKEY *) DatumGetPointer(entry->key);
GBT_NUMKEY_R key;
/* All cases served by this function are exact */
*recheck = false;
key.lower = (GBT_NUMKEY *) &kkk->lower;
key.upper = (GBT_NUMKEY *) &kkk->upper;
PG_RETURN_BOOL(gbt_num_consistent(&key, (void *) &query, &strategy,
GIST_LEAF(entry), &tinfo,
fcinfo->flinfo));
}
Datum
gbt_date_distance(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
DateADT query = PG_GETARG_DATEADT(1);
/* Oid subtype = PG_GETARG_OID(3); */
dateKEY *kkk = (dateKEY *) DatumGetPointer(entry->key);
GBT_NUMKEY_R key;
key.lower = (GBT_NUMKEY *) &kkk->lower;
key.upper = (GBT_NUMKEY *) &kkk->upper;
PG_RETURN_FLOAT8(gbt_num_distance(&key, (void *) &query, GIST_LEAF(entry),
&tinfo, fcinfo->flinfo));
}
Datum
gbt_date_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
void *out = palloc(sizeof(dateKEY));
*(int *) PG_GETARG_POINTER(1) = sizeof(dateKEY);
PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo));
}
Datum
gbt_date_penalty(PG_FUNCTION_ARGS)
{
dateKEY *origentry = (dateKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
dateKEY *newentry = (dateKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
float *result = (float *) PG_GETARG_POINTER(2);
int32 diff,
res;
diff = DatumGetInt32(DirectFunctionCall2(date_mi,
DateADTGetDatum(newentry->upper),
DateADTGetDatum(origentry->upper)));
res = Max(diff, 0);
diff = DatumGetInt32(DirectFunctionCall2(date_mi,
DateADTGetDatum(origentry->lower),
DateADTGetDatum(newentry->lower)));
res += Max(diff, 0);
*result = 0.0;
if (res > 0)
{
diff = DatumGetInt32(DirectFunctionCall2(date_mi,
DateADTGetDatum(origentry->upper),
DateADTGetDatum(origentry->lower)));
*result += FLT_MIN;
*result += (float) (res / ((double) (res + diff)));
*result *= (FLT_MAX / (((GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1));
}
PG_RETURN_POINTER(result);
}
Datum
gbt_date_picksplit(PG_FUNCTION_ARGS)
{
PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
&tinfo, fcinfo->flinfo));
}
Datum
gbt_date_same(PG_FUNCTION_ARGS)
{
dateKEY *b1 = (dateKEY *) PG_GETARG_POINTER(0);
dateKEY *b2 = (dateKEY *) PG_GETARG_POINTER(1);
bool *result = (bool *) PG_GETARG_POINTER(2);
*result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
PG_RETURN_POINTER(result);
}
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